Po171,po174

[1955moose]

Wow, never would have guessed an intake gasket was weather sensative. But I guess if cold air is sneaking past an area that's supposed to be air tight. Could be. Happened to two of you. Did new gasket/ manifold totally take care of problem?


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[jdecker]

Tough to diagnose here are a couple of links were owners spent up to $4000 chasing it before doing gaskets:
Cold Air = Rough Idle - F150online Forums

http://www.fordf150.net/forums/viewtopic.php?t=65607

P.S. yes it totally alleviated the problem

 

[1955moose]

Could be because intake is plastic, others are aluminum or cast iron, it doesn't expand in the cold weather, causing a leak when it gets older or weak. Amazing a $40,000 plus truck and use plastic when aluminum would probably last life of vehicle!


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